Patent US3305726A successfully refreshed from Google Patents.
US3305726A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic core driving circuit
Assignee: Raytheon Co
•
Filing: 1962-11-01
•
Granted: 1967-02-21
•
Expires: 1982-11-01
Abstract
No abstract record available.
Inventors
- 👤 Harold C Goodman
- 👤 Willard J Strong
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 04:00
CPC Classifications
H; H03; H03K; H03K17/00; H03K17/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
239 words
IN A SWITCHING CIRCUIT HAVING A SWITCH WITH OPEN AND CLOSED STATES AND HAVING A DIODE WITH CAPACITANCE ACROSS THE JUNCTION THEREOF, SAID SWITCH COMPRISING A FIRST TRANSISTOR HAVING EMITTER, BASE, AND COLLECTOR ELECTRODES, SAID BASE RESPONSIVELY CONNECTED TO RECEIVE CONTROL SIGNALS FOR SELECTIVELY SWITCHING SAID SWITCH TO SAID OPEN AND CLOSED STATES, A FIRST SOURCE OF REFERENCE POTENTIAL CONNECTED TO SAID FIRST TRANSISTOR EMITTER, A PLURALITY OF JUXTAPOSED MAGNETIC CORE ELEMENTS, A CONDUCTOR THREADING SAID CORE ELEMENTS AND HAVING ONE END RESPONSIVELY COUPLED TO SAID EMITTER ELECTRODE AND THE OTHER END CONNECTED TO THE N JUNCTION OF SAID DIODE, MEANS INCLUDING A SOURCE OF POTENTIAL RESPONSIVELY CONNECTED TO THE P-JUNCTION OF SAID DIODE FOR CAUSING CURRENT TO FLOW THROUGH THE FORWARD DIRECTION OF SAID DIODE, IN SAID CONDUCTOR THROUGH THE EMITTER COLLECTOR CIRCUIT OF SAID FIRST TRANSISTOR, TO SAID FIRST SOURCE OF REFERENCE POTENTIAL WHEN SAID SWITCH IS IN THE CLOSED STATE, AND EMITTER FOLLOWER MEANS RESPONSIVELY COUPLED TO THE N-JUNCTION OF SAID DIODE FOR PROVIDING A BACK POTENTIAL ACROSS SAID DIODE DURING PERIODS WHEN SAID SWITCH IS IN THE OPEN STATE, SAID EMITTER FOLLOWER MEANS INCLUDING A SECOND TRANSISTOR HAVING EMITTER, BASE, AND COLLECTOR ELECTRODES, MEANS FOR CONNECTING THE EMITTER OF SAID FIRST TRANSISTOR TO THE BASE OF SAID SECOND TRANSISTOR, A SECOND SOURCE OF REFERENCE POTENTIAL CONNECTED TO THE COLLECTOR OF SAID SECOND TRANSISTOR, AND MEANS CONNECTING THE EMITTER OF SAID SECOND TRANSISTOR TO SAID CONDUCTOR.
Claim 2
Dependent Claim
239 words
IN A SWITCHING CIRCUIT HAVING A SWITCH WITH OPEN AND CLOSED STATES AND HAVING A DIODE WITH CAPACITANCE ACROSS THE JUNCTION THEREOF, SAID SWITCH COMPRISING A FIRST TRANSISTOR HAVING EMITTER, BASE, AND COLLECTOR ELECTRODES, SAID BASE RESPONSIVELY CONNECTED TO RECEIVE CONTROL SIGNALS FOR SELECTIVELY SWITCHING SAID SWITCH TO SAID OPEN AND CLOSED STATES, A FIRST SOURCE OF REFERENCE POTENTIAL CONNECTED TO SAID FIRST TRANSISTOR EMITTER, A PLURALITY OF JUXTAPOSED MAGNETIC CORE ELEMENTS, A CONDUCTOR THREADING SAID CORE ELEMENTS AND HAVING ONE END RESPONSIVELY COUPLED TO SAID EMITTER ELECTRODE AND THE OTHER END CONNECTED TO THE N JUNCTION OF SAID DIODE, MEANS INCLUDING A SOURCE OF POTENTIAL RESPONSIVELY CONNECTED TO THE P-JUNCTION OF SAID DIODE FOR CAUSING CURRENT TO FLOW THROUGH THE FORWARD DIRECTION OF SAID DIODE, IN SAID CONDUCTOR THROUGH THE EMITTER COLLECTOR CIRCUIT OF SAID FIRST TRANSISTOR, TO SAID FIRST SOURCE OF REFERENCE POTENTIAL WHEN SAID SWITCH IS IN THE CLOSED STATE, AND EMITTER FOLLOWER MEANS RESPONSIVELY COUPLED TO THE N-JUNCTION OF SAID DIODE FOR PROVIDING A BACK POTENTIAL ACROSS SAID DIODE DURING PERIODS WHEN SAID SWITCH IS IN THE OPEN STATE, SAID EMITTER FOLLOWER MEANS INCLUDING A SECOND TRANSISTOR HAVING EMITTER, BASE, AND COLLECTOR ELECTRODES, MEANS FOR CONNECTING THE EMITTER OF SAID FIRST TRANSISTOR TO THE BASE OF SAID SECOND TRANSISTOR, A SECOND SOURCE OF REFERENCE POTENTIAL CONNECTED TO THE COLLECTOR OF SAID SECOND TRANSISTOR, AND MEANS CONNECTING THE EMITTER OF SAID SECOND TRANSISTOR TO SAID CONDUCTOR.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-02-20 | 1970-08-22 | 1971-02-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-02-20 | 1974-08-22 | 1975-02-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-02-20 | 1978-08-22 | 1979-02-21 | $7700.00 | Window Closed / Lapsed |